Chemically Active Rays in the Sun's Atmosphere. '6^7 

 and therefore 



I have collected the observations, which seem to me pretty 

 consistent, in the following Table. The numbers given by the 

 readings of the scale have been reduced so as to make the inten- 

 sity in the middle of the disk equal to 100. 



Distance from 

 centre. 



Intensities. 



Radius =54. 



First image. 



Second image. 







4 



8 



9 

 11 

 12 

 13 

 15 

 16 

 17 

 19 

 20 

 21 

 23 

 24 

 25 

 27 

 28 

 29 

 31 

 32 

 33 

 35 

 36 

 37 

 39 

 40 

 41 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 

 52 

 53 

 53-5 



100-0* 

 100-0 



'990 

 98-9 



97-9 

 97-9 



95-6 

 95-6 



93 ; 4 

 934 



'93 ; 3 

 90-4 



85-9 



83-7 



"li'i 



77-2 



'750 

 68-8 



64-6 



60-3 



'5'3'i 

 '45 ; 8 

 '37 ; 3 

 '29 ; 8 



is 9 



107 



1000 

 990 

 979 



J 000 



958 



950 



901 



85«4 



84-5 



78-1 



677 



56-4 



48-4 



"il-5 



25-3 



18-0 

 101 



The observations were repeated on the 13th of March. Two 



* In the observations the relative intensities were only expressed by 

 whole numbers ; the decimals in the Table arise from the reduction. 



